TWM462800U - vortex compressor oil return device - Google Patents

Abstract

An oil return device and a scroll compressor are provided. The oil return device comprises: a shell (100); a fixed scroll (200) defining a first end surface and a second end surface, in which the first end surface is fixedly connected to an inner end surface of the shell (100), the fixed scroll (200) has an oil passage (240) formed in the first end surface thereof, and the oil passage (240) defines a first end formed with an oil return passage (260) extending through the fixed scroll (200); an orbiting scroll (300) defining a first end surface engaged with the second end surface of the fixed scroll (200); and an end cover (800) having an oil storage chamber (810) communicated with the oil return passage (260).

Description

Oil return device of scroll compressor

The invention relates to a oil return device of a scroll compressor.

The scroll compressor is a kind of air conditioner compressor which has developed rapidly in recent years, and has the characteristics of small volume, high rotation speed, long service life and convenient and simple maintenance. However, at present, many compressors have the problem of lack of oil. In the course of operation, the transmission components are insufficiently lubricated, resulting in serious wear of the parts, affecting the service life of the compressor, and some of the refrigeration oil may also enter the air conditioning system, affecting system heat exchange. Therefore, a good oil return device can extend the service life of the compressor and improve work efficiency.

In the high-efficiency air conditioning scroll compressor oil and gas separation mechanism of the prior art 1, a high pressure chamber composed of a fixed scroll and a rear shell is separated into a high pressure chamber, a separation chamber and an oil storage chamber, and is installed by interference in the separation chamber. The separation core is used for oil and gas separation. Finally, the frozen oil is sprayed through the capillary at the bottom of the oil storage chamber through the annular groove of the fixed scroll, and is then ejected from the capillary communicating with the suction port, and then the frozen oil enters the suction hole again and enters another loop. To achieve separation and oil return. Although this structure achieves oil and gas separation and oil return, it only lubricates the moving and stationary parts during the entire oil return process, and does not provide a good lubrication effect to the transmission part.

In the prior art 2, the oil returning mechanism of the horizontal scroll compressor is opened through the through hole at the center of the crankshaft and under the support frame. There is an oil drain passage, and the refrigerant oil is stored at the bottom of the casing, and the oil is introduced into the crankshaft oil passage by the oil pump, and then flows out from the end surface of the crankshaft to lubricate the thrust surface. This structure only lubricates the thrust surface portion, but does not provide good lubrication for other transmission parts, and the structure is complicated.

The utility model provides an oil return device of a scroll compressor, which solves the technical problem that the scroll compressor oil return device of the prior art can only lubricate certain parts of the compressor.

The present invention provides a recirculating device for a scroll compressor, comprising: a casing; a fixed scroll, the one end surface of the fixed scroll fixedly abuts the inner end surface of the casing; the movable scroll, the static The other end surface of the scroll is matched with one end surface of the movable scroll; and further includes: an oil passage is disposed at a periphery of one side of the inner end surface of the fixed scroll fixed to the casing, and one end of the oil passage is provided An oil hole, the oil return hole penetrating through the static scroll; an end cover, the end cover is provided with an oil storage groove, and the oil return hole is aligned with the oil storage groove.

Further, the other end of the oil passage is provided with a fixed scroll oil storage tank, and the oil return hole is located above the fixed scroll oil storage tank.

Further, a casing oil storage tank corresponding to the fixed scroll oil storage tank is disposed on the casing.

Further, the oil passage is substantially semi-circular.

Further, the oil return hole includes an oil return oil inlet port and a return oil outlet port, and a cross-sectional diameter of the oil return oil outlet port is smaller than a cross-sectional diameter of the oil return oil inlet port.

Further, at the oil return port of the fixed scroll, an oil escape groove is provided.

Further, the oil returning device of the scroll compressor further includes: a support plate, the other end surface of the movable scroll is rotatably coupled to one side of the support plate, and the end cover and the support plate are further One side is fixedly connected, and the support plate is provided with a relief hole corresponding to the oil storage tank.

Further, there are five relief holes on the support plate, and five corresponding oil storage slots are also provided.

Further, the end cover is provided with an eccentric weight receiving groove, and the oil storage groove communicates with the eccentric weight receiving groove.

Further, the oil returning device of the scroll compressor further includes: an eccentric weight, the eccentric weight rotatingly connecting the end cover and being received in the eccentric weight receiving groove.

The advantage of the novel is that the recirculating oil directly injected into the moving and stationary scrolls in the oil return hole lubricates the movable scroll and the fixed scroll of the compressor; and the refrigerating oil sprayed in the oil return hole is stored in the oil storage tank In the middle, the transmission part of the compressor is lubricated, thereby achieving the effects of the lubrication, the fixed scroll and the transmission part.

100‧‧‧Chassis

110‧‧‧Chassis gas exhaust slot

120‧‧‧Chassis oil and gas separation tank

130‧‧‧Chassis oil storage tank

140‧‧‧Exhaust pipe

200‧‧‧Vortex

210‧‧‧Static scroll gas discharge slot

220‧‧‧Static scroll oil and gas separation tank

221‧‧‧Static scroll oil and gas separation straight slot

222‧‧‧Static scroll oil and gas separation bending groove

230‧‧‧ venting holes

231‧‧‧Exhaust valve

240‧‧‧ oil passage

250‧‧‧Static scroll oil storage tank

260‧‧‧ oil return hole

261‧‧‧Return oil inlet

262‧‧‧Return oil outlet

270‧‧‧ Oil escape groove

300‧‧‧dynamic scroll

400‧‧‧ sealed cavity

410‧‧‧ gas discharge chamber

420‧‧‧ oil and gas separation chamber

500‧‧‧ oil storage chamber

600‧‧‧ filter

700‧‧‧support plate

710‧‧‧ escaping holes

800‧‧‧End cover

810‧‧‧ oil storage tank

820‧‧‧Eccentric balance block receiving slot

900‧‧‧Eccentric balance block

1 is a schematic cross-sectional view of a scroll compressor of the present embodiment.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1.

Figure 3 is a cross-sectional view taken along line B-B of Figure 1.

4 is an enlarged schematic view of a region X in FIG. 1.

Figure 5 is a schematic view of a support plate of the present embodiment.

Figure 6 is a schematic view of the end cap and the support plate of the present invention.

Figure 7 is a schematic view showing the explosion of the scroll compressor of the present embodiment.

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clear, the present invention will be further described in detail below with reference to the drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention will be further described below in conjunction with the drawings and embodiments.

As shown in FIG. 1 to FIG. 4, an oil and gas separation device of a scroll compressor according to the present invention includes: a casing 100; a fixed scroll 200, and one end surface of the fixed scroll 200 is fixedly docked to the machine. The inner end surface of the casing 100; the movable scroll 300, the other end surface of the fixed scroll 200 cooperates with the movable scroll 300; wherein, the method further includes: a sealing cavity 400, the sealing cavity 400 is disposed in the casing 100 and The stationary scroll 200 is abutted. The sealed chamber 400 includes a gas discharge chamber 410 and an oil and gas separation chamber 420. The gas discharge chamber 410 communicates with the oil separation chamber 420. The static scroll 200 fixes one end of the inner surface of the docking unit 100. The side is provided with a fixed scroll oil and gas separation tank 220, and the static scroll oil and gas separation tank 220 includes: a fixed scroll oil and gas separation straight groove 221 and a fixed scroll oil and gas separation curved groove 222, and a fixed scroll oil and gas separation straight groove 221 The static scroll oil and gas separation curved groove 222 is described.

The fixed scroll oil and gas separation straight groove 221 includes a first end and a second end, and the second end is in communication with the fixed scroll oil and gas separation curved groove 222, and The communication is located below the static scroll oil and gas separation curved groove 222.

As shown in FIG. 2, the inner surface of the casing 100 is provided with a casing gas discharge groove 110 and a casing oil separation groove 120. The flow path of the casing oil and gas separation groove 120 has a substantially semicircular arc shape. An exhaust pipe 140 is further disposed on the casing 100, and the exhaust pipe 140 communicates with the casing oil and gas separation tank 120, that is, the exhaust pipe 140 communicates with the oil and gas separation chamber 420.

As shown in FIG. 3, one side of the inner surface of the fixed scroll 200 fixed to the docking case 100 is provided with a fixed scroll gas discharge groove 210 and a fixed scroll oil and gas separation groove 220, and the fixed scroll gas discharge groove 210 communicates with the static vortex The oil and gas separation tank 220. The fixed scroll gas discharge groove 210 corresponds to the casing gas discharge groove 110 to form a sealed cavity, that is, the gas discharge chamber 410; the fixed scroll oil and gas separation tank 220 corresponds to the casing oil and gas separation tank 120 to form a sealed cavity, that is, oil and gas Separation chamber 420. The static scroll oil and gas separation tank 220 comprises: a fixed scroll oil and gas separation straight groove 221, the flow channel is a straight groove, the cross section is a semicircle; the constant scroll oil and gas separation curved groove 222, the flow channel design utilizes an effective space as much as possible, and the design The flow path is as long as possible, and the flow path has a substantially semi-circular shape; wherein the fixed scroll oil and gas separation straight groove 221 is connected to the fixed scroll oil and gas separation curved groove 222. The fixed scroll oil and gas separation straight groove 221 includes a first end and a second end, and the second end is in communication with the fixed scroll oil and gas separation curved groove 222, and the communication portion is located below the static scroll oil and gas separation curved groove 222.

The vortex hole 200 is provided with a venting hole 230, and the venting hole 230 is connected to the gas discharge chamber 410. The venting hole 230 is substantially disposed at the center of the fixed scroll 200, and the venting hole 230 is covered with an exhaust valve piece. 231, can prevent gas backflow.

The fixed scroll 200 is fixed to the side of the inner end surface of the docking casing 100 An oil passage 240 is disposed. The oil passage 240 is disposed at a periphery of the end surface of the fixed scroll 200 and has a semi-arc shape. One end of the oil passage 240 is provided with a fixed scroll oil storage tank 250, and the oil passage 240 is further provided. One end is provided with an oil return hole 260, and the oil return hole 260 is connected to the low pressure chamber of the scroll compressor. The oil return hole 260 is located above the fixed scroll oil reservoir 250. At the bottom of the casing oil and gas separation tank 120 on the casing 100, a casing oil storage tank 130 corresponding to the fixed scroll oil storage tank 250 is provided. The fixed scroll oil storage tank 250 forms an oil storage chamber 500 with the corresponding casing oil storage tank 130. The oil storage tank 130 communicates with the oil and gas separation tank 120 of the casing, so the oil storage chamber 500 communicates with the oil separation chamber 420. Wherein, in the oil storage chamber 500, a screen 600 is disposed at a joint between the fixed scroll oil storage tank 250 and the casing oil storage tank 130 to prevent impurities such as metal powder in the freezing oil from re-entering the scroll compressor.

The working principle and process of the oil-gas separation device of the scroll compressor of the present embodiment will be described in detail below.

The other end surface of the fixed scroll 200 cooperates with the movable scroll 300. After the scroll compressor is started, the movable scroll 300 engages the fixed scroll 200, continuously rotates the compressed gas to become a high pressure gas, and is compressed during the compression process. The high pressure gas is mixed with the frozen oil.

The oil and gas mixed high pressure gas is continuously discharged from the exhaust hole 230 to the gas discharge chamber 410 via the exhaust valve piece 231, and since the gas discharge chamber 410 communicates with the oil separation chamber 420, the sealed chamber 400 is formed into a substantially closed high pressure chamber.

After the high-pressure gas is ejected at a high speed, it hits the bottom of the casing 100, and then flows back and forth in the sealed chamber 400. Since the high-pressure gas is continuously ejected from the exhaust hole 230, the pressure of the sealed chamber 400 is increased, so the gas The vortex flow is experienced, and some of it remains at the bottom of the oil-gas separation chamber 420, and becomes a refrigerating oil. Most of the gas flows along the contour of the sealing chamber 400, and firstly separates the straight groove 221 along the static scroll oil and gas, because the flow path is straight. The trough has a semi-circular cross section, so the gas swirls in the inside to accelerate the oil and gas separation process; then, the second end of the straight trough 221 through the hydrocyclone is flowed to the hydrocyclone oil and gas separation curved trough 222, and the hydrocyclone oil and gas The flow channel design of the separation curved groove 222 is designed to utilize the effective space as much as possible, and the designed flow path is as long as possible, so that the oil and gas separation is more thorough; part of the frozen oil is condensed in the inner wall of the cavity of the sealed cavity 400, and under the action of gravity, the frozen oil is along the cavity. Under the contour of the inner wall, it will slowly flow to the oil storage chamber 500. Finally, the frozen oil flows through the screen 600 under the action of gravity and pressure, flows upward along the oil passage 240, and finally flows to the vortex compression through the oil return hole 260. The low pressure chamber of the machine; the gas will continue to flow upward along the contour of the cavity of the sealed chamber 400 under pressure and finally discharged from the exhaust pipe 140. At this point, the entire process of oil and gas separation is completed.

The oil and gas separation device of a scroll compressor of the present invention is provided with a sealing cavity at abutment between the casing and the fixed scroll, and the sealed cavity comprises a gas discharge chamber and an oil and gas separation chamber without additional parts, and the constant scroll oil and gas The separation tank includes a static scroll oil and gas separation straight groove and a static scroll oil and gas separation curved groove, which prolongs the effective path of the oil and gas separation chamber as much as possible, and solves the technical problem that the oil and gas separation of the scroll compressor is not complete, and has a simple structure and low cost.

As shown in FIG. 1 to FIG. 7 , an oil returning device of a scroll compressor according to the present invention includes: a casing 100; a fixed scroll 200, and one end surface of the fixed scroll 200 is fixedly docked to the machine. Inner end surface of the casing 100; a movable scroll 300, the other end surface of the fixed scroll 200 is fitted to one end surface of the movable scroll 300; wherein the fixed scroll 200 is fixed at the periphery of one side of the inner end surface of the docking casing 100. The oil passage 240 is provided at one end of the oil passage 240. The oil return hole 260 extends through the fixed scroll 200; the end cover 800 is provided with an oil storage tank 810. The oil hole 260 is aligned with the oil reservoir 810.

Specifically, the other end of the oil passage 240 is provided with a fixed scroll oil storage tank 250, and the oil return hole 260 is located above the fixed scroll oil storage tank 250, and the advantage is that the frozen oil can be self-gravity It flows up and down, thus lubricating most of the compressor working surface.

A casing oil sump 130 corresponding to the fixed scroll oil reservoir 250 is provided on the casing 100.

The oil passage 240 has a substantially semicircular arc shape.

The oil return hole 260 includes a return oil inlet port 261 and a return oil outlet port 262. The oil return hole 260 has a circular cross section, and the oil return port 262 has a cross-sectional diameter smaller than the oil return port. The cross-sectional diameter of 261 has the advantage that the pressure of the discharged refrigerating oil can be increased.

The oil return device of the scroll compressor further includes:

a support plate 700, the other end surface of the movable scroll 300 is rotatably coupled to one side of the support plate 700, and the end cover 800 is fixedly coupled to the other side of the support plate 700. A relief hole 710 corresponding to the oil reservoir 810 is provided.

An eccentric weight 900, the eccentric weight 900 is rotated The end cover 800 is received in the eccentric weight receiving groove 820. The end cover 800 is provided with an eccentric weight receiving groove 820 , and the oil storage groove 810 communicates with the eccentric weight receiving groove 820 . The eccentric weight block 900 is rotatably connected to the end cover 800 and received in the eccentric weight block accommodating groove 820. The sump 810 and the eccentric weight block accommodating groove 820 communicate with each other, and thus the gravity and eccentric weight block 900 The frozen oil sufficiently lubricates the various transmission components under centrifugation.

In the present embodiment, there are five relief holes 710 on the support plate 700. Therefore, five oil reservoirs 810 are also provided. It can be understood that the number of the relief holes 710 and the oil reservoir 810 is limited. It is not limited and meets the design requirements.

Since the oil return hole 260 penetrates the fixed scroll 200, the movable scroll 300 rotates continuously, so that a part of the frozen oil injected in the oil return hole 260 is directly sprayed on the movable scroll 300 and the fixed scroll 200. On one side end surface of the fitting, the working surface between the movable scroll 300 and the fixed scroll 200 is directly lubricated; another portion of the frozen oil is injected into the oil reservoir 810 through the escape hole 710. Wherein, at the oil return port 262 of the fixed scroll 200, an oil discharge avoiding groove 270 is provided, so that the frozen oil can be smoothly discharged from the oil return hole 260. Since the movable scroll 300 is an eccentric disc structure, when the edge of the movable scroll 300 is turned to oppose the oil return hole 260, the oil can be smoothly ejected by the oil discharge avoiding groove 270 and the passive scroll 300 is brought to the movable and static vortex. Between the disks, the moving and stationary scrolls are lubricated; when the edge of the movable scroll 300 is turned away from the oil return hole 260, the oil is directly injected into the oil reservoir 810 from the escape hole 710.

The oil return device of a scroll compressor of the present invention directly injects the refrigerating oil on the moving and stationary scrolls into the oil return hole, and lubricates the movement of the compressor The scroll and the fixed scroll; the refrigerating oil sprayed in the oil return hole is stored in the oil reservoir, and the transmission portion of the compressor is lubricated.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

800‧‧‧End cover

810‧‧‧ oil storage tank

820‧‧‧Eccentric balance block receiving slot

Claims (10)

An oil returning device of a scroll compressor, comprising: a casing; a fixed scroll, a one end surface of the fixed scroll fixedly abuts an inner end surface of the casing; a movable scroll, another of the fixed scroll The one end surface cooperates with one end surface of the movable scroll; and further includes: an oil passage is disposed at a periphery of one side of the inner end surface of the fixed scroll fixed to the fixed casing, and one end of the oil passage is provided back An oil hole, the oil return hole penetrating through the static scroll; an end cover, the end cover is provided with an oil storage groove, and the oil return hole is aligned with the oil storage groove. The oil returning device of the scroll compressor according to claim 1, wherein the other end of the oil passage is provided with a fixed scroll oil storage tank, and the oil return hole is located above the oil storage tank of the fixed scroll. The oil returning device of the scroll compressor according to claim 2, characterized in that the casing is provided with a casing oil storage tank corresponding to the fixed scroll oil storage tank. An oil returning device of a scroll compressor according to claim 1, wherein the oil passage has a semicircular arc shape. The oil returning device of the scroll compressor according to claim 1, wherein the oil return hole comprises an oil return oil inlet port and an oil return oil outlet port, and the oil return port has a cross-sectional diameter smaller than that of the oil return port. The cross-sectional diameter of the oil inlet. The oil returning device of the scroll compressor according to claim 5, characterized in that the oil returning recess is provided at the oil returning port of the fixed scroll. The oil returning device of the scroll compressor of claim 1, further comprising: a support plate, the other end surface of the movable scroll being rotatably coupled to one side of the support plate, the end The cover is fixedly connected to the other side of the support plate, and the support plate is provided with a relief hole corresponding to the oil storage groove. The oil returning device of the scroll compressor according to claim 7, wherein the support plate has five relief holes, and the corresponding oil storage tank is also provided with five. The oil return device of the scroll compressor according to claim 1, wherein the end cover is provided with an eccentric weight receiving groove, and the oil storage groove communicates with the eccentric weight receiving groove. The oil returning device of the scroll compressor of claim 9, further comprising: an eccentric weight, the eccentric weight rotatingly connecting the end cover and being received in the eccentric weight receiving groove .